.section-book{
  padding: 15rem 0;
  background-image: linear-gradient(to right bottom,$color-primary-light,$color-primary-dark);

  .book{
    border-radius: 3px;
    height: 50rem;
    box-shadow: 0 1.5rem 4rem rgba($color-black,.2);
    .book-form{
      width: 50%;
      padding: 6rem;

      .u-center-text{
        text-align:center;
        margin: 0 auto;
        transform: translateX(-7rem);
        .heading-secondary{
          font-size: 3.5rem;
          text-transform: uppercase;
          font-weight: 700;
          background-image: linear-gradient(to right, $color-primary-light,$color-primary-dark);
          display: inline-block;
          //规定背景的绘制区域
          -webkit-background-clip: text;
          color: transparent;

          letter-spacing: .2rem;
          transition: all .2s;

          &:hover{
            //一个元素在二维平面上的倾斜转换
            transform: skewY(2deg) skewX(15deg) scale(1.05);
            text-shadow: .5rem 1rem 2rem rgba($color-black,.3);
          }
        }
      }
      .u-margin-bottom-medium{
        margin-bottom: 5rem;
      }
    }
  }
}
